Volume 10 Issue 5
Oct.  2021
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WANG Yu, LIU Kang, WANG Jianqiu, et al. Rotational Doppler detection of a cone-shaped target under the illumination of a vortex electromagnetic wave[J]. Journal of Radars, 2021, 10(5): 740–748. doi: 10.12000/JR21074
Citation: WANG Yu, LIU Kang, WANG Jianqiu, et al. Rotational Doppler detection of a cone-shaped target under the illumination of a vortex electromagnetic wave[J]. Journal of Radars, 2021, 10(5): 740–748. doi: 10.12000/JR21074

Rotational Doppler Detection of a Cone-shaped Target under the Illumination of a Vortex Electromagnetic Wave

doi: 10.12000/JR21074
Funds:  The National Natural Science Foundation of China (61801486, 61921001)
More Information
  • Corresponding author: LIU Kang, liukang1117@126.com
  • Received Date: 2021-06-07
  • Rev Recd Date: 2021-08-13
  • Available Online: 2021-09-06
  • Publish Date: 2021-09-06
  • The vortex ElectroMagnetic (EM) wave has a unique spiral phase wavefront. The rotational Doppler effect, induced by the lateral micromotion of a target is expected to provide a new mode of radar target detection. Under the illumination of vortex EM waves, the micromotion of a cone-shaped target periodically modulates the instantaneous frequency of the radar echo; this can effectively reflect the geometric characteristics and micromotion parameters of a cone-shaped target. This paper focuses on the estimation of cone-shaped target parameters under forward-looking radar conditions. First, based on the principle of vortex EM wave target rotational Doppler detection, a mathematical equation describing the vortex EM wave of a cone-shaped target echo is derived, and an echo rotational Doppler model is established. Second, a method for cone-shaped target parameter estimation under forward-looking conditions is proposed. Using the two-dimensional rotational Doppler information of the scattering points at the top and bottom of a cone-shaped target, the micromotion and geometric parameters of the target can be effectively estimated. The simulation results verify the effectiveness and robustness of the method proposed in this paper.

     

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